Bottle cap or seal.



G. HAMMER.

f BOTTLE GAP 0R SEAL.

I r' LPPLIOATION FILED APL.8.1911. K '1,0273330.` PanteaMay 21,1912.

t d t y``` 16 I L f womto@ *rgb` all whom 'it concern:

y'fature -ofvbot-tle caps of this tvpe'ythe use assi?r AVAILABLE Corax UNITED strariis .rairENir-onrica. Y,

CHARLES aannemer BROOKLYNQNEW Yoan, .assIGNoB 'ro annmoanimn'rancar COMPANY, or BROOKLYN, NEW YORK, aconrona'rronror Naw Yom;

Boa'irLE car on .snag

yBe it known that I, CHARLES HAMMER, a'

c itizenfofthe United States, residing at v Brooklyn, in the county ofKings andState of New York, have invented new andlruseful Iinproveinents'inl Bottle Caps or Seals,

(Case A of which the followingis afspeciicati'on.

This invention relates to sheet-metal bottle caps `or seals of that character having inpunched locking projections upon the flanges thereof to engage threads upon the mouth of the bottle or jar. In the manuofvery thin sheet-metal is desirableftirst, on account of economy of material, whereby the caps 'may be manufactured and' Vsold at less cost, and, second,`because of the more read response of thin metal to the action of the orming dies, whereby better shaped and more :accurately-fitting caps may be made,

a factor of importance in 7sealing the'ibottleor -container tightly against evaporation `or s the'ingress of air.- y There are disadvantages attendant upon the use of lvery thin metal, however, resulting from thetendency ofthe 1 capA formed therefrom to bend or warpout of shape under pressures from handling, the

ydrawing strainV of. the. locking projections ""fp'o'n the flange from contact with the yhreads -in applving the c` ap,ffand the griping o rations; In the manufacture of caps of this character it is also desirable to provide a cap which will compensate for any inaccuracy of tit which would otherwise occur as a result of variations from the nor` "mal in the thickness of the tin plate or`1n be` made of very thin sheet-metal and is yet strong and rigid enough to withstand all the imposed strains without bending out of y shape, and which is at the same time adapted to compensate to some extent for variations from the normal in the dimensions andy arrangement of the basal shoulder andthreads upon .the neck of the container.`

" The inventionconsists ofthe features of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being y iig action of the thumb and fingers on the flange in both the applying and the removi-y 1911; ser'iai it. 619,741.

. had tothe accompanying drawing, in whichz-k l F igure'l is aside elevation `of the upper Fig. 2 is a bottoni plan view of vvthe "cap-re# ofone ofthe instruck lockingjprojections.

gations.` Fig. 5 is a fragmentary vertical inner sideof the flange thereof/.-

' formed of thin sheet nietal and kcomprises a top4 having a# depending annularflange to flange having an upper circular ortruly" cylindrical 'portion 5 and' a. bell-mouthed vor toA bindy `againstzthe shoulder 3 when the `rscribed into concave-convex form "by the transverselyto yield Ior give when coming ing the binding action of the cap uponthe shoulder to more firmly retain the 'cap in apportion 6 also enables the application of shoulder or its distance from the threads varies on account of any imperfections in the formation ofy the neck due to imperfections in the forming mold, such 'as the warping or shrinking of the mold from accurate t of the cap upon the neck and the under allcoiidi'tions of service. rl `he same action occurs where any variation in the moved. Fig. 3, is a vertical sectionjthroiighy one side of the jar neck and cap on lthe line inclose the neck 1 above the shoulder 3, said cap is fully appl'iedf The portion 6-by"beling outwardly`r {iared in #the manner de-v actiony of aforming die, is stifenedf and -reinfoi'ced to a `material extent, and yet isy sutlicieiitlyv resilient `both vertically and Ain* contact with the shoulder 3, thus increas` plied position. This resilient action of theV caps to necks in which thethickness ofthev s 1 Pateneediuayzi, 1912.

portion offa j ar'se'aled by myfimproved capa F 4f is a verticalsection' through one side of the cap on aline between adjacent corni-v y asv section through thecap ylooking toward the i Referringjto 'the drawingffthe numeral lk t f designates a `neckof. a ',bott1e,-l jarlor other `1 with external'serew'threads 2 and an annue. y

which shoulder the. "basal edge ofthe lange of ythe cap usually bindswhent-hej capf'is" s f 75,1."/5.

outwardly f' and downwardly flared z lower' rportion or skirt 6, the convexl underside' of the free edge of which is adapted ordinarily l continued use. By thisineans an absolutely. l

tight sealing of the .container 'is insured i thickness of the met-al prevails, as will be readily understood. The upper portion of the ange is provided with a continuous series of corrugations or vertical bulges 7 all ofwhich are struck outwardly beyond the plane of such portion of the flange, in order that the corrugations will clear the threads 2 and willnot bind upon the threads and prevent the free application of the cap in the event that any imperfections or variations in dimensions occur in either the threads or cap under the conditions mentioned. These corrugat-ions stiffen and strengthen the portion 5 and in addition form a milled ripping surface whereby thecap may be rmlyengaged in applying and removing. Immediately below the vertical corrugations i the tiared portion 6 is formed at intervals with instruck locking4 projections 8 to engage the threads 2, whereby the cap 1s held and forced down upon the neck to effect a tight seal and to hold t-he usual liner or sealing disk 9 clamped against thevrlrnl edge of the neck. These locking projections, for the sake of strength, are preferably made of triangular or semielliptlcal form and are arranged at the point of junction of the flange port-ions 5 and 6 and separated from the former by substantially horizontal slits l0, so that the upper edge l1 of the projection will extend inwardly and form1 a bearing surface to engage and bind against the under s'ide of the'4 thread. As shown, the projections are tangentially arranged, so

' that the bearing edges 11 will incline in the threads.`

accordance with the degree of inclination of The described construction of l the projections gives them great inherent strength to withstand vthe pressureimposed '4.0 in their engagement with the threads, and

they are reinforced and additionally strengthened by the concavo-convex curvature'of the skirt 46. By also arranging the j In the operation ofapplying and removing a cap, it will be understood that the projections are subjected to considerable force in riding up and down upon the threads, and tend to set up a downward pull upon the flange sufficient, in a plane or unreinforced cap ofthin metal, to bend or buckle the top "of the cap and thus distort the cap out of shape and render it unfit for use. By reinforcing the cap in the manner described, this objection is avoided', while at the same time a structure is produced which enables the cap to be made of thin sheet metal with a high degree of economy of manufacture andl accuracy of lit upon normal containers, which cap is permitted by the flexibility of the portion 6 to yield Sulliciently without becoming distorted to accommodate itself to slight.imperfections or variations which may exist in the thickness of the metal `or dimensions of the thread and shoulder.

Having thus described the invention, 1 claim :--A

A sheet metal bottle cap having a circular crown portion,"` and a flange depending therefrom and `having a cylindrical upper halfprovided with an annular series of closely related outstruck vertical corrugations extending the full depth thereof and having its lower half continuouslyiiared outwardly and downwardly in lpronounced bell-mouth form beyond the plane of said corrugations, said flared portion of the flangev being provided with substantially semielliptical vertical instruck locking projections segmentally curved or bowed both longi- :tudinally and transversely and having their major axes inclined at an angle to the nor-k mal perpendicular plane of the flange, the upper edges of said projections being separated from the fiange and inclined to the horizontal plane thereof and projecting in.

. CHARLES HAMMER.

Witnesses: I j

CHRISTIAN H. WERiIER, WM. A. Kunz. 

